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Remanufactured short block 1
Long Blocks

M45 EJ25 Premium Remanufactured Long Block for 2006-2014 Subaru WRX

In stock
Head Studs
Connecting Rods
Oil Pan Option
Add STI 11mm Oil Pump
Timing Components Installed
Base price$5,995.95
Options$0.00
Total$5,995.95
Deposit due now$500.00
Balance due later$5,495.95
  • Base price shown excludes option upcharges; all options are priced separately.
  • Base price shown excludes tax and shipping (if applicable).

EJ25 Long Block Perfected

The turbocharged EJ25 engines, especially the EJ255, have become iconic in the automotive world. Known for their power, tuning potential, and unique Subaru boxer sound, these engines have played a crucial role in the success of the WRX, both in racing and everyday performance.

Say Goodbye to Factory Flaws

Rod Bearing Failures
Often found in modified or high-mileage engines; proper maintenance and upgraded components help mitigate this risk.
Oil Consumption
Some engines may consume oil, requiring regular monitoring to maintain optimal performance.

Precision Executed

The engine case, using seasoned case halves, undergoes a comprehensive bore and deck process. Precision boring and honing ensure perfect fitment and alignment, while torque plate honing further enhances accuracy—resulting in a flawless engine case built for optimal performance.

Unmatched Durability

At the heart of this short block is a new OEM Subaru Nitride-Treated Crankshaft, designed for peak performance and durability in 2004-21 STI, 2004-08 Forester XT, and 2005-09 Legacy GT. Built to fit all EJ25 engines, this crankshaft ensures a strong foundation for reliability.

The Power of Resized Connecting Rods

Resized connecting rods restore original dimensions for precise fitment and optimal oil clearance, reducing the risk of rod knock and improving longevity. ACL or King hardened rod and main bearings further enhance durability under high-stress conditions.

Premium Wiseco Subaru EJ25 WRX/STI Forged Piston Kit

Forged pistons, known for their exceptional strength and wear resistance, add significant value to the engine's performance and overall durability. If it's modified for more power, the stock cast pistons may not be able to withstand the increased stress. This is where forged pistons come in. We have also equipped the engine with high-grade piston rings and seals, improving the engine's compression and oil control.

Remanufactured Cylinder Heads

Cylinder heads are precision resurfaced with valve lash set and a complete valve job performed. Qualcast steel valve guides and new OEM valve stem seals are installed, and the heads are assembled using Six Star MLS head gaskets, torqued to factory specifications.

Made Stout with ARP

ARP head studs are thread-rolled after heat treatment, increasing fatigue strength by up to 1000%. Essential for performance engines under increased boost, they provide superior clamping force and long-term reliability.

To Sum It Up

  • Seasoned case halves
  • Seasoned Subaru crankshaft
  • Wiseco forged pistons with new rings and seals
  • Resized connecting rods
  • ACL or King hardened rod and main bearings
  • ARP 2000 head studs
  • Valve lash set
  • Six Star MLS head gaskets
  • Qualcast steel valve guides
  • New OEM valve stem seals
  • Fits WRX 2006-2014, Legacy GT 2007-2009, Forester XT 2009-2013, Outback XT 2007-2009.

Warranty

M45 Automotive warrants this engine against defects in workmanship and materials for 24 months or 24,000 miles (whichever comes first) from the date of receipt.

Core Charge Policy

No up-front core charge is required. Customers must return their old short block within 30 days of purchase. Failure to do so will void the warranty and result in a $1,000 charge. All cores are accepted regardless of condition, provided they match original specifications.

Freight Shipping

Freight is charged up front for both outbound shipment and inbound core return, ensuring full transparency with no surprise shipping costs.